About Us
Experienced Loft Conversion & Home Extension Specialists in Barnet, North London, Welwyn Garden City & Hertfordshire
At Reservoir Construction, we are a family-run, licensed building company with over 20 years of experience in crafting beautiful loft conversions, home extensions and garden rooms. Based in Hertfordshire, we proudly serve households across Barnet, North London, Hertfordshire and Welwyn Garden City.
Our mission? To exceed expectations with a professional, reliable, and responsive service tailored to your vision. From your initial consultation through to project completion, we deliver outstanding quality, clear communication, and long lasting results.
Our Services
Loft Conversions
Specialising in Dormer, Hip-to-gable, L-shaped, and Roof Light loft conversions that add valuable living space and boost property value by up to 25%.
Home Extensions
Creating bespoke side, rear, kitchen, and garage extensions to transform the heart of your home.
Garden Rooms & Renovations
Enhancing outdoor living spaces and adding stylish functionality.
We blend smart design with quality craftsmanship, always tailored to your home’s unique needs.
Why Homeowners Choose Us?
Local Expertise
Proudly serving Barnet, North London, Hertfordshire and Welwyn Garden City, we understand the unique architecture and planning regulations of these areas.
Fully Managed Process
We collaborate closely with you from initial consultation to project completion, ensuring your vision is realised. On-time and on-budget, with minimum disruption while maximising results.
Quality Craftsmanship
Our team of skilled professionals maintain the highest standards of workmanship. And we are proud to offer a 10-year guarantee on all workmanship - because true quality should stand the test of time.
Gallery
New kitchen installed by Reservoir Construction, in a recent home extension.
New dormer loft extension by Reservoir Construction
New kitchen installed by Reservoir Construction, in a recent home extension.